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Stith J.C.,University of Texas at Austin | Helwig T.A.,University of Texas at Austin | Williamson E.B.,University of Texas at Austin | Frank K.H.,Hirschfeld Industries | And 4 more authors.
Journal of Structural Engineering (United States) | Year: 2012

The stability of I-girders during erection can be difficult to assess because of the limited presence of bracing and uncertainty in the support conditions of the girders. The behavior of curved girders during the early stages of construction is complicated because the curved geometry can lead to significant torsion. This paper highlights results from a research study that included both field monitoring and parametric finite-element investigations. Curved I-shaped girders were instrumented and monitored during lifting to provide data to validate finite-element models. Both rotational displacements and stress were measured during the lifting process. In this paper, the writers compare data collected from field tests with results computed from detailed finite-element simulations. A prismatic and a nonprismatic girder (with two different cross sections) were considered in the investigation. The I-girders experienced both rigid body rotation and cross-sectional twist. Additionally, the torsional warping stresses were observed to be of the same order of magnitude as the strong-axis bending stresses. However, it should be noted that the total stresses were well below yielding. The fact that the stresses are low during lifting should not be confused with a noncritical stage in the safety of the girders. Although the applied stresses are low, the stresses necessary to buckle the girder or to cause large deformations are also relatively low because usually no bracing exists and limited restraint is provided to the girders during lifting. The finite-element models were able to capture the measured behavior accurately, providing insight into appropriate assumptions and critical features for modeling curved I-girders during lifting. © 2012 American Society of Civil Engineers.


News Article | February 15, 2017
Site: www.prweb.com

For more than 40 years, the SPE International Polyolefins Conference has provided a premier, value-packed event - a place for you to advance your knowledge, network with colleagues, and hear and learn about new technologies, ideas and industry trends. The conference will be at the Hilton Houston North Hotel in Houston, TX on Feb 26-Mar 1. Featuring over 650 attendees, 60+ exhibitor booths, 80+ technical papers, 5 Plenary speakers, a Sunday afternoon tutorial, 2 networking socials, and an annual student poster competition. More than 60% of the profits from this conference go to support education. Currently eight Texas universities with polymer programs benefit. "Catalyst, Polymerization Processes, and Applications of Polyolefins" will feature the following speakers: 1- Polyethylene Catalysts and Polymerization Processes --Dr. Clifford Lee (Townsend) 2- Polypropylene Catalysts and Polymerization Processes -- Dr. C.P Cheng (Clariant) 3- Polyethylene Thermoforming --Dr. Michael Killough ( INEOS Olefins and Polyolefins) 4- Polyolefin Films --Pat Thomas ( PR Thomas Technologies, LLC) 1- New Era of Global Polyolefins: Supply Demand Dynamics for 2017 to 2021 and 2026 -- Roberto Ribeiro (Townsend Solutions)      2- Asian Polyolefin Market Trends and Strategic Moves -- Sungwoo Kwon (Hansha International)      3- Recent Trends in the North American Propylene and Polypropylene Market -- Anusha Kothandaraman (Braskem)      4- Creating Value Through Innovation: The LyondellBasell Approach -- Steve Davis (LyondellBasell)      5- Sabic SK Nexelen Company and the impact on the Polyethylene Industry -- Ethan Rafei (SABIC) Special Sessions on Wednesday Morning (March 1):      1- Food Contact Regulations      2- Innovations Strategies and Commercialization featuring Bill Higgs discussing how Mustang Engineering became a billion dollar company in 25 years with a unique company culture, innovation, and customer focus. For more Information and to Register go to:


Wu W.J.,Mustang Engineering | Wu W.J.,Louisiana State University | Cai C.S.,Louisiana State University
Structural Engineering and Mechanics | Year: 2010

Excessive stay cable vibrations can cause severe problems for cable-stayed bridges. In this paper a semiactive Magnetorheological (MR) damper is investigated to reduce cable vibrations. The control-oriented cable-damper model is first established; a computer simulation for the cable-damper system is carried out; and finally a MR damper is experimentally used to reduce the cable vibration in a laboratory environment using a semiactive control algorithm. Both the simulation and experimental results show that the semiactive MR damper achieves better control results than the corresponding passive damper. Copyright © 2010 Techno Press.


Zwerneman F.J.,Mustang Engineering | Digre K.A.,API Consultant
Proceedings of the Annual Offshore Technology Conference | Year: 2010

This paper summarizes the updating of API RP 2A Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms - Working Stress Design - API RP 2A-WSD 21 st Edition with Supplements 1, 2, and 3, to a 22 nd Edition. That 22 nd Edition is planned to be the last edition of API RP 2A-WSD. API RP 2A was due for a revisian. Generally, API standards are reviewed and revised, reaffirmed, or withdrawn at least every five years. A complete and thorough review of the document was long overdue. The 21 st edition was issued in December 2000, Supplement 1 in December 2002, Supplement 2 in September 2005, and Supplement 3 in October 2007. In addition, API desired to incorporate the content from API Bulletins 2INT-MET, 2INT-DG, and 2INT-EX plus accommodate development and alignment of API Recommended Practices 2SIM, 2MET, 2EQ, and 2GEO with ISO. In the process of making editorial revisions, it became obvious that some technical revisions were also needed. Copyright 2010, Offshore Technology Conference.


Walther S.,Mustang Engineering
SPE Oil and Gas India Conference and Exhibition 2010, OGIC | Year: 2010

Onshore LNG import and regasification terminals face potential environmental, permitting, cost and schedule issues that can be avoided by use of offshore floating LNG regasification units, FSRUs. The regas technology typically used in a FSRU depends on burning gas or utilizing open loop sea water for the source of heat of vaporization. Burning gas has an environmental impact to the air and the cost of consuming gas that could be sold. Using sea water imposes thermal and chemical impact on marine life. LNG Smart® Air Vaporization (SAV) is an alternative technology that transfers heat from ambient air to the LNG which reduces gas usage and air emissions dramatically, uses no sea water and creates no water pollution.


Palmer R.E.,Mustang Engineering
11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings | Year: 2011

A financial analysis for an onsite facility to recover high purity propylene from refinery propane/propylene is put forward. The critical variables involved in the optimization of equipment sizes and operating costs for the recovery of high purity propylene by conventional distillation and distillation using a heat pump are examined. A capital cost estimate for each scheme and ranking based on an investment plus operating cost formula is then presented. Moreover, the discounted cash flow rate of return as a function of propylene value, utilities cost, and facility capacity is highlighted. The value of the PP feed stream is calculated as a function of the rate of return for the project and the other variables. This is an abstract of a paper presented at the 2011 AIChE Spring Meeting & 7th Global Congress on Process Safety (Chicago, IL 3/13-17/2011).


Glaves P.,Mustang Engineering | Buchanan J.,Mustang Engineering
11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings | Year: 2011

Compliance with the "Mandatory Reporting of Greenhouse Gases: Petroleum and Natural Gas Systems" for the gas processing and gathering industry has been challenging in many ways. A discussion covers the approach taken to identify the requirements and achieve regulatory compliance at major oil and gas operating company with Subparts C and W of the rule; legacy facilities; facility definition conflicts; and measurements and tracking. This is an abstract of a paper presented at the 2011 AIChE Spring Meeting & 7th Global Congress on Process Safety (Chicago, IL 3/13-17/2011).


Palmer R.E.,Mustang Engineering
12AIChE - 2012 AIChE Spring Meeting and 8th Global Congress on Process Safety, Conference Proceedings | Year: 2012

An update on the critical process design issues for hydrotreating diesel fuel to meet ultra-low sulfur diesel (ULSD) requirements based on the knowledge gained since ULSD regulations were put in place is presented. This is an abstract of a paper presented at the 2012 AIChE Spring Meeting and 8th Global Congress on Process Safety (Houston, TX 4/1-5/2012).


Yano C.A.,University of California at Berkeley | Shen Z.-J.M.,University of California at Berkeley | Chan S.,Mustang Engineering
International Journal of Production Research | Year: 2013

Academic libraries are reducing their holdings of print journals as more of this material becomes available electronically. Our work was motivated by the desire of the management at JSTOR, a major electronic archive of research journals, to preserve clean copies that retain full information accuracy from the vantage point of the researcher, but the broader community of librarians at research libraries is extremely concerned about this issue as well. We present results of a research project designed to provide guidelines and insight to JSTOR management and to the community of librarians at research institutions in this context. As a prelude, we report briefly on statistical analysis of defects in the pages of 25 journals for their entire publication history. This provides a backdrop for our approach to the problem. We then present models for two storage protocols, both of which have the goal of finding minimum-cost or Pareto optimal policies for ensuring, with a high probability, survival of at least one copy for a specified time horizon. One protocol involves archiving only clean copies in a secure environment, and the second protocol is a hybrid approach that combines clean copies with backup copies that can be cleaned up to replace clean copies that are lost or damaged. We also discuss other domains where our methodology can be applied. © 2013 Taylor & Francis.


Trademark
Mustang Engineering | Date: 2012-06-19

Computer software for use in database management of pipeline data; computer software for managing a database of electronic pipeline information for use by various field service units within the pipeline industry.

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